of days, the depression drifted towards the west, while gradually intensifying and organizing further. Late on January 29, the JTWC issued a Tropical Cyclone Formation Alert on the developing tropical depression, before designating it as 11P and initiating advisories on the system. Early the next day, RSMC Nadi reported that the depression had intensified into a category one tropical cyclone and named it Yasi, while it was located about 510 km (320 mi) to the northeast of Port Vila in Vanuatu. Yasi continued to intensify throughout that day, while affecting the Solomon Islands and Vanuatu. Early on January 31, RSMC Nadi reported that Yasi had intensified into a category two tropical cyclone, before reporting that it had become a severe tropical cyclone. During that afternoon, both the JTWC and RSMC Nadi reported that the system had moved across 160°E and had moved out of the South Pacific Basin and into the Australian region, where it became a much stronger storm before striking Queensland during the first days of February. Tropical Cyclone Zaka Early on February 5, RSMC Nadi reported that Tropical Disturbance 10F, had developed about 200 km (125 mi), to the south east of Nukualofa in Tonga. During that day, the disturbance gradually organized further whilst moving towards the east. RSMC Nadi, then classified the disturbance as a tropical depression, later that day. Intensification continued and on the next day, RSMC Nadi upgraded Tropical Depression 10F into a Tropical Cyclone and named it 'Zaka'. Soon, Zaka crossed 25°S and TCWC Wellington took full responsibility of the Cyclone. Hours later, the JTWC initiated advisories on the system and designated it with '12P'. At midnight, that day, TCWC Wellington further upgraded Zaka into a Category 2 Tropical Cyclone. Early on the next day, the system started weakening and became a Category 1 Tropical Cyclone. Hours later, TCWC Wellington downgraded Zaka, into a low, no longer considering it tropical. Late on that day, the JTWC, reporting that the system weakened rapidly, issued their final warning on the system. Weather warnings were issued to the Raoul Island as the system intensified and could bring a significant amount of rain. Zaka was initially expected to move in a southernly path and impact New Zealand. However, the system rapidly weakened and passed several miles east of the islands. Severe Tropical Cyclone Atu Early on February 13, RSMC Nadi reported that Tropical Disturbance 11F had formed